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Finding the Fourth Proportional to 15,040.71, 20,753.85 and 8,667.60

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Solution

The fourth proportional to 15,040.71, 20,753.85 and 8,667.60 is: 11,959.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,040.71 : 20,753.85 = 8,667.60 : x
  2. Step 2: Convert to fraction form
    15,040.71/20,753.85 = 8,667.60/x
  3. Step 3: Cross multiply
    15,040.71x = 20,753.85 × 8,667.60
  4. Step 4: Simplify right side
    15,040.71x = 179,885,923.15
  5. Step 5: Solve for x
    x = 179,885,923.15/15,040.71
  6. Step 6: Final answer
    x = 11,959.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.